A) \[7\times {{10}^{-4}}\,s\]
B) \[14\times {{10}^{-4}}\,s\]
C) \[28\times {{10}^{-4}}\,s\]
D) none of these
Correct Answer: A
Solution :
[a] Time period, \[T=2\pi \sqrt{LC}=2\pi \sqrt{(50\times {{10}^{-3}})\times 4\times {{10}^{-\,6}}}\] \[=28\times {{10}^{-\,4}}s\] Time taken by capacitor to charge fulley, \[t=\frac{T}{4}=7\times {{10}^{-\,4}}s.\]
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